CN116293165A - Resistance valve - Google Patents
Resistance valve Download PDFInfo
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- CN116293165A CN116293165A CN202310027918.4A CN202310027918A CN116293165A CN 116293165 A CN116293165 A CN 116293165A CN 202310027918 A CN202310027918 A CN 202310027918A CN 116293165 A CN116293165 A CN 116293165A
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- outer cylinder
- cylinder body
- inner cylinder
- bottom plate
- sliding block
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- 239000004033 plastic Substances 0.000 claims abstract description 50
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- 206010018910 Haemolysis Diseases 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229960000074 biopharmaceutical Drugs 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/02—Energy absorbers; Noise absorbers
- F16L55/027—Throttle passages
- F16L55/02772—Throttle passages using spirally or helically shaped channels
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Reciprocating Pumps (AREA)
- Valve Housings (AREA)
Abstract
The invention relates to a resistance valve comprising: the inner cylinder body can deform outwards along the radial direction, a semi-elliptical outer spiral groove is formed in the outer wall of the inner cylinder body, and an inclined deformation chute is formed in the inner cylinder body; the sliding block slides in the inner cylinder body along the extending direction of the deformation sliding groove, the inclined surface of the sliding block is abutted on the deformation sliding groove, and the inner cylinder body is pushed to deform outwards along the radial direction through the sliding block; the rotating shaft is in threaded connection with the sliding block, and the sliding block is driven to slide along the axial extending direction of the rotating shaft by rotating the rotating shaft; the outer cylinder body is sleeved outside the inner cylinder body, a semi-elliptical inner spiral groove is formed in the inner wall of the outer cylinder body, and the inner spiral groove and the outer spiral groove are matched to form a multi-layer spiral plastic pipeline accommodating space. The invention adopts a spiral winding mode to increase the clamping length of the plastic pipeline and provide proper resistance for the plastic pipeline through the radial deformation of the cylinder body, thereby providing the back pressure required by the operation of the pump connected with the pipeline and reducing the influence on the flowing medium in the plastic pipeline.
Description
Technical Field
The invention relates to the field of pharmacy and biotechnology, in particular to a resistance valve.
Background
The resistance valve (back pressure valve) can maintain the pressure required by the pipeline, so that the pump can normally output flow. Back pressure, which is the pressure of the output fluid of the pump that acts in reverse to the output direction, occurs for pump-like operation. Typically, a resistance valve (back pressure valve) is used for the liquid delivery link.
As artificial hearts, i.e. centrifugal blood pumps, are increasingly being used in clinic, they place higher demands on the safety of the blood pump. The in vitro hemolysis test is a key element for evaluating the hemolytic performance of the blood pump. In an extracorporeal test platform of a blood pump, a resistance valve is often used for extruding a medical hose to form a local narrow structure, and pressure loss is provided to offset the pressure head of the blood pump, so that a loop meeting test conditions is formed. However, the local flow field at the narrow part is complex and has a backflow area, so that the blood flow stress is increased sharply, and the blood damage is increased greatly. In addition to the blood damage caused by the blood pump being tested, the blood damage caused by components in the circuit, particularly the resistance valve that adjusts the back pressure, may affect the accuracy, reproducibility and comparability between test results.
The valve is expanded to a flowing medium pipeline involving a resistance valve (back pressure valve), the influence of the resistance valve (back pressure valve) on various indexes of the flowing medium is not negligible, and the resistance valve can be used for a loop for conveying sensitive fluids such as blood, protein macromolecular drugs, ultra-clean raw materials, fuel and the like. In particular, in the biomedical industry, it is desirable to minimize the extent of damage to flowing media during liquid delivery, such as delivery of biopharmaceutical liquids, blood, cell suspensions, and the like. While various components in the conveying loop have a certain influence on the medium, so that the optimization of the partial composition in the conveying pipeline is required.
The prior art has the publication number: WO2007107692A1, entitled: the patent of valve discloses a resistance valve of extrusion plastic tubing, and this product relies on the screw thread to realize compressing member's lift through twisting the knob, will place in the plastics pipeline of base concave surface and carry out changeable flattening, and pipeline appearance local narrow structure after flattening, liquid flow is blocked suddenly in the narrow department to realize providing the effect of backpressure in the pipeline, make keep enough pressure in the whole circuit, let the water pump can normally work, guarantee the normal flow of liquid in the pipeline.
The resistance valve prepared by the above patent has the following disadvantages:
1. the traditional resistance valve forms a narrow structure with too small sectional area, has larger damage degree to blood and larger interference to a test result, and the test result cannot reflect the damage degree of the blood pump to the blood, so that the purpose of detecting the performance of the blood pump cannot be achieved, the detection efficiency is reduced, the experiment time is wasted, and the experiment materials are consumed; the valve is expanded to more fields, and besides blood, protein macromolecular drugs, ultra-clean raw materials, fuel and other sensitive fluids can be influenced by the traditional resistance valve.
2. The resistance valve has the advantages of small adjustable pressure range, low adjustment precision and low reaction speed.
3. The resistance valve can not store more liquid at the same time so as to replace a liquid reservoir.
Disclosure of Invention
Therefore, the invention aims to solve the technical problems that the traditional resistance valve in the prior art has a narrow structure with too small sectional area, so that the damage to blood is large, and provides the resistance valve which adopts a spiral winding mode to increase the clamping length of the plastic pipeline and provides proper resistance for the plastic pipeline through radial deformation of the cylinder body, thereby providing the back pressure required by the plastic pipeline and reducing the influence on flowing media in the plastic pipeline.
In order to solve the above technical problems, the present invention provides a resistance valve for providing resistance to a liquid in a plastic pipe, comprising:
the inner cylinder body is of a cylindrical structure, the inner cylinder body can deform outwards in the radial direction, a semicircular outer spiral groove is formed in the outer wall of the inner cylinder body, and an inclined deformation chute is formed in the inner cylinder body;
the sliding block is arranged in the inner cylinder body and is provided with an inclined surface matched with the deformation sliding groove, the sliding block slides in the inner cylinder body along the extending direction of the deformation sliding groove, the inclined surface of the sliding block is abutted to the deformation sliding groove, and the sliding block pushes the inner cylinder body to deform outwards along the radial direction;
the rotating shaft is arranged in the inner cylinder body, penetrates through the sliding block and is in threaded connection with the sliding block, and the sliding block is driven to slide along the axial extending direction of the rotating shaft by rotating the rotating shaft;
the outer cylinder body is sleeved outside the inner cylinder body, a semicircular inner spiral groove is formed in the inner wall of the outer cylinder body, and the inner spiral groove is matched with the outer spiral groove to form a multi-layer spiral plastic pipeline accommodating space.
In one embodiment of the present invention, a plurality of deformation grooves are formed on the side wall of the inner cylinder, the deformation grooves are arranged along the axial extension direction of the inner cylinder, and the deformation grooves are uniformly distributed around the circumference of the inner cylinder.
In one embodiment of the present invention, a plurality of deformation grooves are formed on the side wall of the inner cylinder, the deformation grooves are arranged along the axial extension direction of the inner cylinder, and the deformation grooves are uniformly distributed around the circumference of the inner cylinder.
In one embodiment of the invention, the outer cylinder body is formed by splicing a plurality of circular arc sheets end to form a cylindrical structure, and a buckling structure is arranged between two connected circular arc sheets.
In one embodiment of the present invention, the rotating shaft portion protrudes from the inner cylinder, and a handle is provided at one end of the rotating shaft protruding from the inner cylinder.
In one embodiment of the present invention, further comprising:
the bottom plate, the said inner cylinder and outer cylinder are all set up on the said bottom plate, the said inner cylinder is set up with the said bottom plate integrally, the said outer cylinder is buckled and set up on the said bottom plate;
the outer cylinder fixing ring is sleeved outside the outer cylinder body, a retainer ring for limiting the outer cylinder fixing ring is arranged on the bottom plate, and the outer cylinder body is connected to the bottom plate in a locking manner by the outer cylinder fixing ring;
the cover plate is arranged corresponding to the bottom plate and buckled above the inner cylinder body and the outer cylinder body, and a rotary shaft hole is formed in the cover plate;
the connecting limiting rod is arranged on the bottom plate and extends towards the cover plate, and the cover plate is connected to the connecting limiting rod through bolts in a locking mode.
In one embodiment of the invention, the outer cylinder fixing ring is provided with a fixing clamping block, and the bottom plate is provided with an outer cylinder fixing ring clamping groove; the outer cylinder fixing ring clamping groove and the fixing clamping block are correspondingly arranged in position, and the fixing clamping block can be inserted into the outer cylinder fixing ring clamping groove by rotating the outer cylinder fixing ring;
the outer cylinder fixing ring is also provided with a rotary handle.
In one embodiment of the invention, the cover plate is further provided with an inner cylinder positioning block, and an inner cylinder positioning groove matched with the inner cylinder positioning block is arranged at the connection position of the inner cylinder body and the cover plate.
In one embodiment of the invention, the bottom plate and the cover plate are respectively provided with an outer cylinder lower positioning block and an outer cylinder upper positioning block, and the connection position of the outer cylinder body and the bottom plate and the cover plate is provided with an outer cylinder positioning groove matched with the outer cylinder lower positioning block and the outer cylinder upper positioning block.
In one embodiment of the invention, the bottom plate and the cover plate are respectively provided with a plurality of outer cylinder lower positioning blocks and outer cylinder upper positioning blocks, and the outer cylinder lower positioning blocks and the outer cylinder upper positioning blocks are unevenly distributed.
Compared with the prior art, the technical scheme of the invention has the following advantages:
according to the resistance valve, the inner cylinder body and the outer cylinder body are matched to form the multi-layer spiral plastic pipeline accommodating space, the clamping length of the plastic pipeline is increased in a spiral winding mode, and proper resistance is provided for the plastic pipeline through radial deformation of the cylinder body, so that back pressure required by the operation of a pump connected with the pipeline is provided, and the influence on flowing media in the plastic pipeline is reduced;
the resistance valve not only changes the pressure by changing a single parameter of the radius of the pipeline, but also changes the pressure by changing two parameters of the length of the pipeline and the area of the through flow section of the pipeline, so that the adjustable pressure range and the pressure adjusting precision can be improved;
the resistance valve provides pressure in the radial direction, can provide certain resistance when the plastic pipeline is not flattened, and can avoid blood damage caused by non-physiological shearing stress caused by extrusion to a certain extent;
the invention has a longer plastic pipeline accommodating space, can store more liquid when being used as a resistance valve, replaces two components of the resistance valve and a liquid reservoir in a loop, and can simplify the loop structure to a certain extent.
Drawings
In order that the invention may be more readily understood, a more particular description of the invention will be rendered by reference to specific embodiments thereof that are illustrated in the appended drawings, in which
FIG. 1 is a schematic view of the overall structure of a resistance valve of the present invention;
FIG. 2 is a schematic view of the internal cross-sectional structure of the resistance valve of the present invention;
FIG. 3 is a schematic diagram of the explosive construction of the resistance valve of the present invention;
FIG. 4 is a schematic view of the structure of the inner cylinder and bottom plate of the present invention;
FIG. 5 is a schematic view of the structure of the slider of the present invention;
FIG. 6 is a schematic structural view of a rotary shaft of the present invention;
FIG. 7 is a schematic view of the structure of the outer cylinder of the present invention;
FIG. 8 is a schematic structural view of a cover plate of the present invention;
fig. 9 is a schematic structural view of the outer cylinder fixing ring of the present invention.
Description of the specification reference numerals: 1. a bottom plate; 11. a positioning block under the outer cylinder; 12. an outer cylinder fixing ring clamping groove; 13. a retainer ring; 14. connecting a limiting rod; 2. an inner cylinder; 21. a deformation chute; 22. an outer helical groove; 23. a deformation groove; 24. an inner cylinder positioning groove; 3. an outer cylinder; 31. an inner spiral groove; 32. an inlet and outlet hole; 33. a buckle structure; 34. an outer cylinder positioning groove; 4. an outer cylinder fixing ring; 41. fixing the clamping block; 42. rotating the handle; 43. a Z-shaped clamping groove; 5. a slide block; 51. an inclined surface; 52. a trapezoidal nut; 53. a slider cover plate; 6. a rotation shaft; 61. a lower shaft sleeve; 62. a bearing; 63. a bearing cover plate; 64. an upper shaft sleeve; 65. a handle; 7. a cover plate; 71. a rotation shaft hole; 72. a connecting rod hole; 73. an inner cylinder positioning block; 74. a positioning block is arranged on the outer cylinder; 8. a plastic pipe accommodating space; 9. butterfly screw.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific examples, which are not intended to be limiting, so that those skilled in the art will better understand the invention and practice it.
Referring to fig. 1 to 3, the present invention discloses a resistance valve, comprising: the device comprises a bottom plate 1, an inner cylinder body 2 arranged on the bottom plate 1, an outer cylinder body 3 sleeved outside the inner cylinder body 2, an outer cylinder fixing ring 4 for locking and connecting the outer cylinder body 3 and the bottom plate 1, a sliding block 5 arranged in the inner cylinder body 2, a rotating shaft 6 for driving the sliding block 5 to slide in the inner cylinder body 2 and a cover plate 7 buckled on the inner cylinder body 2 and the outer cylinder body 3; wherein: the inner cylinder body 2 is of a cylindrical structure, the inner cylinder body 2 can deform outwards in the radial direction, an inclined deformation chute 21 is arranged in the inner cylinder body 2, the sliding block 5 is provided with an inclined surface 51 matched with the deformation chute 21, the rotating shaft 6 is arranged in the inner cylinder body 2, the rotating shaft 6 penetrates through the sliding block 5 and is in threaded connection with the sliding block 5, the rotating shaft 6 is rotated to drive the sliding block 5 to slide along the axial extending direction of the rotating shaft 6, the sliding block 5 slides in the inner cylinder body 2 along the extending direction of the deformation chute 21, the inclined surface 51 of the sliding block 5 abuts against the deformation chute 21, and the sliding block 5 pushes the inner cylinder body 2 to deform outwards in the radial direction; a semicircular outer spiral groove 22 is formed in the outer wall of the inner cylinder body 2, a semicircular inner spiral groove 31 is formed in the inner wall of the outer cylinder body 3, and the inner spiral groove 31 and the outer spiral groove are matched to form a multi-layer spiral plastic pipeline accommodating space 8;
the plastic pipeline is wound between the inner cylinder 2 and the outer cylinder 3 along the multi-layer spiral plastic pipeline accommodating space 8, back pressure is provided by means of the on-way resistance loss and the local resistance loss of the bending part of the plastic pipeline, meanwhile, the inner cylinder 2 is pushed to deform radially by matching with the sliding block 5, the plastic pipeline is clamped in a tapered and gradually-expanded mode to further supplement the back pressure, the influence of the local narrow structure on blood damage is avoided, the pressure is changed by changing one parameter of the pipeline radius, and the pressure is changed by changing two parameters of the pipeline length and the pipeline through-flow cross-section area, so that the adjustable pressure range and the pressure adjusting precision can be improved; the radial deformation of the inner cylinder body 2 provides pressure in the radial direction, so that certain resistance can be provided when the plastic pipeline is not flattened, and the blood damage caused by non-physiological shearing stress caused by extrusion can be avoided to a certain extent; in addition, the resistance valve of the embodiment is provided with a longer plastic pipeline accommodating space 8, and can store more liquid at the same time when being used as the resistance valve, so as to replace two components of the resistance valve and the liquid reservoir in the loop, and the loop structure can be simplified to a certain extent.
According to Poiseuille law of fluid mechanics (Poiseuille's law), the Poiseuille law formula: q=pi×r≡4×Δp/(8ηl), defining the flow resistance r=8ηl/(pi r≡4);
when the flow Q, the viscosity coefficient eta of the liquid and the pipeline length L are fixed, the flow resistance R is inversely proportional to the pipeline radius R to the power of 4, which shows that the influence of the pipeline radius on the flow resistance is very large, so that the traditional resistance valve only changes the adjustment precision of the radius of the plastic pipeline and is not high;
at a certain flow rate Q, viscosity coefficient eta of the liquid and pipeline radius R, the pipeline length L is in direct proportion to the flow resistance R, and the back pressure can be provided by extending the pipeline length;
according to the technical scheme of the embodiment, the analysis of the poiseuille law is conducted, the radial deformation of the inner cylinder body 2 is adopted to integrally extrude the plastic pipeline along the length direction of the plastic pipeline, the fixed-point extrusion is avoided to form a narrow structure with too small cross section area, the pipeline length can be further increased in a spiral winding mode, back pressure required by a loop pipeline can be provided, and the influence on flowing media in the pipeline is reduced.
Referring to fig. 4, in this embodiment, the inner cylinder 2 and the bottom plate 1 are integrally formed, in order to achieve deformation of the inner cylinder 2 in a radial direction, a plurality of deformation grooves 23 are formed on a side wall of the inner cylinder 2, the deformation grooves 23 are disposed along an axial extension direction of the inner cylinder 2, the deformation grooves 23 are uniformly distributed around a circumferential direction of the inner cylinder 2, and when the side wall of the inner cylinder 2 is extruded by the sliding block 5, the deformation grooves 23 are opened, so that a diameter of the inner cylinder 2 is increased.
Specifically, in this embodiment, the outer cylinder 3 is sleeved outside the inner cylinder 2, and the outer cylinder 3 needs to be connected with the bottom plate 1, so an outer cylinder lower positioning block 11 for limiting the outer cylinder 3 is disposed on the bottom plate 1, the outer cylinder 3 is placed on the bottom plate 1 and is connected to the bottom plate 1 in a locking manner through the outer cylinder fixing ring 4, and therefore an outer cylinder fixing ring clamping groove 12 and a retainer ring for limiting the outer cylinder fixing ring 4 are also disposed on the bottom plate 1.
Specifically, in this embodiment, during assembly, since the inner spiral groove 31 on the inner wall of the outer cylinder 3 needs to be matched with the outer spiral groove on the outer wall of the inner cylinder 2, only one positional relationship exists between the outer cylinder 3 and the inner cylinder 2, and in order to ensure the accuracy of the sleeved position of the outer cylinder 3, a plurality of outer cylinder lower positioning blocks 11 are provided on the base plate 1, and a plurality of outer cylinder lower positioning blocks 11 are unevenly distributed, so that only one positional connection relationship exists between the outer cylinder 3 and the base plate 1.
Specifically, in this embodiment, the cover plate 7 is fastened to the inner cylinder 2, so an inner cylinder positioning groove 24 is provided at a connection position between the upper edge of the inner cylinder 2 and the cover plate 7, the cover plate 7 is fastened to the inner cylinder 2, and the position of the cover plate 7 is limited by the inner cylinder positioning groove 24.
Specifically, in order to realize connection between the cover plate 7 and the inner cylinder 2, in this embodiment, a connection limiting rod 14 is further disposed on the bottom plate 1, the connection limiting rod 14 is disposed in the inner cylinder 2, the connection limiting rod 14 extends toward the cover plate 7, and the cover plate 7 is locked and connected to the connection limiting rod 14 through a butterfly screw 9, so as to fix the cover plate 7; in this embodiment, the connection limiting rod 14 not only plays a role of fixing the cover plate 7, but also the connection limiting rod 14 is disposed in the inner cylinder 2, and the connection limiting rod 14 penetrates through the sliding block 5, so that the sliding block 5 slides in the inner cylinder 2 along the extending direction of the connection limiting rod 14, and therefore, the connection limiting rod 14 also plays a role of limiting and guiding the sliding block 5.
Referring to fig. 5, in this embodiment, in order to realize the threaded connection between the slider 5 and the rotation shaft 6, a trapezoidal nut 52 is embedded in the central position of the slider 5, the trapezoidal nut 52 is fixed in the slider 5 by a slider cover 53, and the slider cover 53 is connected with the slider 5 by threads.
Referring to fig. 6, in the present embodiment, in order to achieve connection between the rotation shaft 6 and the base plate 1, a lower shaft sleeve 61 and a bearing 62 are provided at a connection end of the rotation shaft 6 and the base plate 1, one end of the lower shaft sleeve 61 is sleeved outside the rotation shaft 6 and connected to the rotation shaft 6, the other end of the shaft sleeve is inserted into the bearing 62, the bearing 62 is embedded into the base plate 1, the bearing 62 is fixed in the base plate 1 by the bearing cover 63, the bearing cover 63 is connected with the base plate 1 by screw threads, connection between the rotation shaft 6 and the base plate 1 is achieved by the shaft sleeve and the bearing 62, and rotation of the rotation shaft 6 relative to the base plate 1 is ensured; in order to achieve a connection of the rotary shaft 6 to the cover plate 7, an upper sleeve 64 is provided at the connection end of the rotary shaft 6 to the cover plate 7.
Specifically, in order to conveniently drive the rotation shaft 6 to rotate, a handle 65 is further provided at an end of the rotation shaft 6.
Referring to fig. 7, the side wall of the outer cylinder body 3 is provided with a plurality of access holes 32, the access holes 32 are respectively and correspondingly communicated with plastic pipe accommodating spaces 8 located at different layers, the plastic pipes enter and exit from the access holes 32, in this embodiment, seven layers of spiral plastic pipe accommodating spaces 8 are provided, six access holes 32 are correspondingly provided on the side wall of the outer cylinder body 3, and six access holes 32 are respectively located in the plastic pipe accommodating spaces 8 of the 1 st, 2 nd, 3 rd, 5 th, 6 th and 7 th layers, so that the plastic pipes can be wound in the plastic pipe accommodating spaces 8 according to specified turns, for example: when the winding number of the plastic pipeline is required to be 3, two ends of the plastic pipeline can pass through the inlet and outlet holes 32 of the 3 rd layer and the 5 th layer respectively; when the winding number of the plastic pipeline is required to be 5, two ends of the plastic pipeline can pass through the inlet and outlet holes 32 of the layers 2 and 6 respectively; when the winding number of the plastic pipeline is required to be 7, two ends of the plastic pipeline can pass through the inlet and outlet holes 32 of the 1 st layer and the 7 th layer respectively;
in other embodiments, the plastic pipe accommodating space 8 without layers and the access holes 32 corresponding to different layer positions can be opened according to actual use requirements, so as to realize the combination of more winding requirements.
Specifically, for convenient disassembly and installation, in this embodiment, the outer cylinder 3 is configured to be formed into a cylindrical structure by splicing a plurality of circular arc sheets end to end, and a fastening structure 33 is disposed between two connected circular arc sheets.
Specifically, the outer cylinder 3 is placed on the bottom plate 1, and then the cover plate 7 is fastened on the outer cylinder 3, and in order to realize connection between the outer cylinder 3 and the bottom plate 1 and between the outer cylinder 3 and the cover plate 7, an outer cylinder positioning groove 34 is provided at a connection position between the outer cylinder 3 and the bottom plate 1 and between the outer cylinder 3 and the cover plate 7.
Referring to fig. 8, in the present embodiment, the rotation shaft 6 protrudes from the inner cylinder 2, and the protruding portion of the rotation shaft 6 passes through the cover 7, so that a rotation shaft hole 81 through which the rotation shaft 6 passes is formed in the cover 7; in this embodiment, the connection limiting rod 14 also needs to pass through the cover plate 7, and then the cover plate 7 is locked and connected to the connection limiting rod 14 by bolts, so that the cover plate 7 is further provided with a connecting rod hole 82.
Specifically, in order to realize the connection between the cover plate 7 and the inner cylinder 2 and the outer cylinder 3, an inner cylinder positioning block 83 and an outer cylinder upper positioning block 84 are further arranged on the cover plate 7, the inner cylinder positioning block 83 is arranged in a position matching manner with the inner cylinder positioning groove 24 on the inner cylinder 2, and the outer cylinder upper positioning block 84 is arranged in a position matching manner with the outer cylinder positioning groove 34 on the outer cylinder 3.
Specifically, in the present embodiment, in order to ensure that only one positional relationship exists between the cover 7 and the outer cylinder 3 and the inner cylinder 2 during assembly, a plurality of outer cylinder upper positioning blocks 84 are provided on the cover 7, and a plurality of outer cylinder upper positioning blocks 84 are unevenly distributed, so that only one positional connection relationship exists between the cover 7 and the outer cylinder 3.
Referring to fig. 9, in this embodiment, the outer cylinder 3 is locked and fixed on the bottom plate 1 by the outer cylinder fixing ring 4, so that a fixing clamping block 41 is provided on the outer cylinder fixing ring 4, the fixing clamping block 41 is matched with an outer cylinder fixing ring clamping groove 12 provided on the bottom plate 1, and the outer cylinder fixing ring 4 is rotated to insert the fixing clamping block 41 into the outer cylinder fixing ring clamping groove 12, so that the outer cylinder fixing ring 4 and the bottom plate 1 are quickly connected.
Specifically, in order to facilitate the rotation of the outer cylinder fixing ring 4, a rotation handle 42 is further provided on the outer cylinder fixing ring 4;
specifically, in the embodiment, in order to facilitate installation of the outer cylinder fixing ring 4, the outer cylinder fixing ring 4 is also formed by splicing a plurality of circular arc ring bodies end to end, and two adjacent circular arc ring bodies are connected through a Z-shaped clamping groove 43.
The installation process of the resistance valve of the embodiment is as follows:
1. preparation of the slide 5: the trapezoidal nut 52 is placed in the central groove of the slide 5, and the slide cover plate 53 is screwed into the thread of the central groove, so that the trapezoidal nut 52 is fixed in the slide 5.
2. Installation of the rotation shaft 6: the lower shaft sleeve 61 is placed into a clamping groove at the lower side shaft end of the base, the bearing 62 is connected with the rotating shaft 6, then the combined rotating shaft 6 is placed into the clamping groove through an opening at the lower side of the base, the bearing 62 is fixedly connected with the base, and finally the bearing cover plate 63 is screwed into the thread of the central groove.
3. The slider 5 is screwed into the rotation shaft 6.
4. The upper boss 64 is put into the rotation shaft hole 81 of the cover plate 7.
5. The plastic pipe is wound into the outer spiral groove of the inner cylinder body 2 according to a specified number of turns (3/5/7 turns).
6. The outer cylinder 3 is placed on the base according to the arrangement of the lower positioning blocks 11 of the outer cylinder, wherein two ends of the plastic pipeline pass through the inlet and outlet.
7. The outer cylinder fixing ring 4 is fitted into the corresponding position of the base, and then the outer cylinder fixing ring 4 is rotated to the locking position using the rotation handle 42 to achieve locking of the outer cylinder 3.
8. The cover plate 7 is fastened to the upper surfaces of the inner cylinder 2 and the outer cylinder 3 according to the distribution of the inner cylinder positioning grooves 24 and the outer cylinder positioning grooves 34.
9. The cover plate 7 is connected to the connecting limiting rod 14 in a locking way by using a butterfly screw 9.
10. The handle 65 is mounted to the rotation shaft 6.
The application method of the resistance valve of the embodiment comprises the following steps:
after the installation is finished, the sliding block 5 can be driven to move downwards by rotating the handle 65 clockwise, so that the inner cylinder body 2 deforms outwards along the radial direction, the effect of clamping the plastic pipeline is achieved, and the aim of providing a quite resistance for a loop is fulfilled;
after clamping, the sliding block 5 can be driven to move upwards by rotating the handle 65 anticlockwise, so that the inner cylinder 2 deforms inwards along the radial direction, the effect of loosening the plastic pipeline is achieved, and the aim of reducing resistance of a loop is fulfilled.
Specifically, in this embodiment, the bottom plate 1, the inner cylinder 2, the outer cylinder 3, the outer cylinder fixing ring 4, the sliding block 5, and the cover plate 7 may be processed by using technologies such as 3D printing and injection molding;
in the manufactured samples, the inner cylinder 2 needs to bear bending deformation and bear great radial force, 3D printing is performed by adopting high-toughness nylon, and the sliding block 5 is simultaneously subjected to radial pressure due to the embedded trapezoidal nut 52, and the 3D printing is performed by adopting nylon and glass fiber.
Considering that the torsional strength of the rotary shaft 6 prepared by 3D printing is insufficient, the rotary shaft 6 needs to be made of steel to meet the requirement of torsional strength.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations and modifications of the present invention will be apparent to those of ordinary skill in the art in light of the foregoing description. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the invention.
Claims (10)
1. A resistance valve for providing resistance to a liquid in a plastic conduit, comprising:
the inner cylinder body is of a cylindrical structure, the inner cylinder body can deform outwards in the radial direction, a semi-elliptical outer spiral groove is formed in the outer wall of the inner cylinder body, and an inclined deformation chute is formed in the inner cylinder body;
the sliding block is arranged in the inner cylinder body and is provided with an inclined surface matched with the deformation sliding groove, the sliding block slides in the inner cylinder body along the extending direction of the deformation sliding groove, the inclined surface of the sliding block is abutted to the deformation sliding groove, and the sliding block pushes the inner cylinder body to deform outwards along the radial direction;
the rotating shaft is arranged in the inner cylinder body, penetrates through the sliding block and is in threaded connection with the sliding block, and the sliding block is driven to slide along the axial extending direction of the rotating shaft by rotating the rotating shaft;
the outer cylinder body is sleeved outside the inner cylinder body, a semi-elliptical inner spiral groove is formed in the inner wall of the outer cylinder body, and the inner spiral groove is matched with the outer spiral groove to form a multi-layer spiral plastic pipeline accommodating space.
2. The resistance valve of claim 1, wherein: the side wall of the inner cylinder body is provided with a plurality of deformation grooves, the deformation grooves are arranged along the axial extension direction of the inner cylinder body, and the deformation grooves are uniformly distributed around the circumference of the inner cylinder body.
3. The resistance valve of claim 1, wherein: the side wall of the outer cylinder body is provided with a plurality of access holes, the access holes are correspondingly communicated with plastic pipeline accommodating spaces positioned on different layers respectively, and the plastic pipeline is accessed from the access holes.
4. The resistance valve of claim 1, wherein: the outer cylinder body is formed into a cylindrical structure by splicing a plurality of circular arc sheets end to end, and a buckling structure is arranged between two connected circular arc sheets.
5. The resistance valve of claim 1, wherein: the rotating shaft part protrudes out of the inner cylinder body, and a handle is arranged at one end of the rotating shaft protruding out of the inner cylinder body.
6. The resistance valve of claim 1, wherein: further comprises:
the bottom plate, the said inner cylinder and outer cylinder are all set up on the said bottom plate, the said inner cylinder is set up with the said bottom plate integrally, the said outer cylinder is buckled and set up on the said bottom plate;
the outer cylinder fixing ring is sleeved outside the outer cylinder body, a retainer ring for limiting the outer cylinder fixing ring is arranged on the bottom plate, and the outer cylinder body is connected to the bottom plate in a locking manner by the outer cylinder fixing ring;
the cover plate is arranged corresponding to the bottom plate and buckled above the inner cylinder body and the outer cylinder body, and a rotary shaft hole is formed in the cover plate;
the connecting limiting rod is arranged on the bottom plate and extends towards the cover plate, and the cover plate is connected to the connecting limiting rod through bolts in a locking mode.
7. The resistance valve of claim 6, wherein:
the outer cylinder fixing ring is provided with a fixing clamping block, and the bottom plate is provided with an outer cylinder fixing ring clamping groove; the outer cylinder fixing ring clamping groove and the fixing clamping block are correspondingly arranged in position, and the fixing clamping block can be inserted into the outer cylinder fixing ring clamping groove by rotating the outer cylinder fixing ring;
the outer cylinder fixing ring is also provided with a rotary handle.
8. The resistance valve of claim 6, wherein: an inner cylinder positioning block is further arranged on the cover plate, and an inner cylinder positioning groove matched with the inner cylinder positioning block is arranged at the connection position of the inner cylinder body and the cover plate.
9. The resistance valve of claim 6, wherein: the bottom plate and the cover plate are respectively provided with an outer cylinder lower positioning block and an outer cylinder upper positioning block, and the connection position of the outer cylinder body and the bottom plate and the cover plate is provided with an outer cylinder positioning groove matched with the outer cylinder lower positioning block and the outer cylinder upper positioning block.
10. The resistance valve of claim 9, wherein: the bottom plate and the cover plate are respectively provided with a plurality of outer cylinder lower positioning blocks and outer cylinder upper positioning blocks, and the outer cylinder lower positioning blocks and the outer cylinder upper positioning blocks are unevenly distributed.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310027918.4A CN116293165A (en) | 2023-01-09 | 2023-01-09 | Resistance valve |
| PCT/CN2023/074209 WO2024148647A1 (en) | 2023-01-09 | 2023-02-02 | Resistance valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310027918.4A CN116293165A (en) | 2023-01-09 | 2023-01-09 | Resistance valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116293165A true CN116293165A (en) | 2023-06-23 |
Family
ID=86802181
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310027918.4A Pending CN116293165A (en) | 2023-01-09 | 2023-01-09 | Resistance valve |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN116293165A (en) |
| WO (1) | WO2024148647A1 (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4317604A1 (en) * | 1993-05-27 | 1994-12-01 | Festo Kg | Throttle valve |
| JP2000179748A (en) * | 1998-12-10 | 2000-06-27 | Yoshio Imada | Structure of resistance valve |
| US20040182436A1 (en) * | 2003-03-18 | 2004-09-23 | Graham Steven H | High pressure, low flow rate fluid flow control |
| GB0605408D0 (en) * | 2006-03-17 | 2006-04-26 | Bio Pure Technology Ltd | Valve |
| US10094489B2 (en) * | 2015-02-03 | 2018-10-09 | Control Components, Inc. | Axial resistance valve trim design |
| CN113713237B (en) * | 2021-11-03 | 2022-02-11 | 丰凯医疗器械（上海）有限公司 | Fixed locking structure, medical catheter and blood pump |
-
2023
- 2023-01-09 CN CN202310027918.4A patent/CN116293165A/en active Pending
- 2023-02-02 WO PCT/CN2023/074209 patent/WO2024148647A1/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| WO2024148647A1 (en) | 2024-07-18 |
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